import { initDynamicRouter } from './dynamicRouter';
import {
  isDynamicRouterInitialized,
  markDynamicRouterInitialized,
  getDynamicRouterBootstrapPromise,
  setDynamicRouterBootstrapPromise,
  setInitializingDynamicRouter,
} from './dynamic-router-state';

export type EnsureDynamicRouterOptions = {
  /** 默认：登录已带 menus 时不强制清空重建 */
  forceRefresh?: boolean;
};

/**
 * 保证动态路由已 addRoute。多处调用共享同一 Promise。
 */
export function ensureDynamicRouterReady(
  options: EnsureDynamicRouterOptions = {},
): Promise<void> {
  if (isDynamicRouterInitialized()) {
    return Promise.resolve();
  }

  const existing = getDynamicRouterBootstrapPromise();
  if (existing) {
    return existing;
  }

  setInitializingDynamicRouter(true);
  const promise = initDynamicRouter({
    forceRefresh: options.forceRefresh ?? false,
  })
    .then(() => {
      markDynamicRouterInitialized(true);
    })
    .catch((err) => {
      setDynamicRouterBootstrapPromise(null);
      markDynamicRouterInitialized(false);
      throw err;
    })
    .finally(() => {
      setInitializingDynamicRouter(false);
    });

  setDynamicRouterBootstrapPromise(promise);
  return promise;
}